A spokeswoman for the Wisconsin Democratic Party says the Republican Senate primary race is shaping up to be a “circus.”

Republican U.S. Rep. Sean Duffy announced Thursday that he would not run for the Senate next year against incumbent Sen. Tammy Baldwin. At least seven other Republicans are being mentioned as potential candidates.

Drummond says “No matter what circus emerges, Tammy Baldwin will continue to stand up to the powerful interests in Washington and fight for a Wisconsin economy that works for everyone, not just those at the top.”

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A former Marine and former Democrat says he is “strongly considering” a run for U.S. Senate as a Republican next year.